On an 04', there is a green and blue harness on each side of the exhaust to plug into the 02 sensors. Which is for the front, and which is for the back o2 sensor?
I am assuming the green is front, and the blue is rear based on the placement of the wiring harness, but the extensions that UPR sent didn't want to snap in place unless I snipped off one of the tabs on the rear o2 sensor plastic harness.